ISA-CAN20X2 User`s Manual
Contents
1. and jumper choice all need to carry out under power off 5 1 Installation Step 1 Align the card vertically to any extend slot and use hand to plug the card to extend slot with downward strength 2 Tighten the screws and connect input output cable 5 2 Removing Step 1 Disconnect input output signal cable and tweak down the screws 2 Two hand use force upward vertically to pull out the card from extend slot 6 The Problem Solving While Using All ISA CAN20X2 cards will be checked before leave factory to ensure the manufacture handed to user accord to the need of design index But the using environment of user differ in thousands ways there will occur some problem at using process unavoidably There are the solving ways of the common problem below 6 1 ISA CAN20X2 Card Can t Communicate The ISA CAN20X2 card can t communicate is a complicated problem It is maybe the hardware configuration problem and maybe the software running environment configuration problem The user can adopt the following steps 1 Check the setting of address switch if conflict with other device or not 2 Check the interrupt setting of ISA CAN20X2 card if conflict with the interrupt of existing device Please change the interrupt number of ISA CAN20X2 card 6 2 ISA CAN20X2 Card Communication Fails Too Many ISA CAN20X2 card communication fails too many can solve by following steps 1 Check the matching resistance of ISA CAN20X2 car2. Install fail and the called parameters of port isn t right 2 Install fail as to write CAN register fail 2 2 Uninstall CANDriver Function prototype void UninstallCANDriver void Function Release the system resource occupied by CAN driver program before the program exit Parameters no Return value no 2 3 SendCANFrame Function prototype int SendCANFrame unsigned char farpHrame Function Transmit CAN communication package Parameters pFrame is the far pointer point to the buffer that saves the transmit communication package and this buffer area s length is 10 bytes Return value 1 Transmit success 0 Transmit fail 2 4 ReadCANFrame Function prototype int RendCANFrame unsigned char_far pHrame Function Receive CAN communication package from buffer queue Parameters pFrame is the far pointer point to the buffer that saves the transmit communication package and this buffer area s length is 10 bytes Return value gt 0 There are message packages not read from the buffer queue lt 0 Buffer queue is empty and can be returned Note When this port call the recall function at disposal code Index 1 must call repeatedly until the port return value less than or equal 0 viz read out all the message packages from buffer queue Or else interrupt service program won t call recall function until the buffer area is full and call recall function again with Index 2 This port also can
3. 2 Uninstall CANDriver J ernrrrrrvrrnnrrrenvrrenrrrrerrersnverenvrrenrerennrerenverennersnnsssnrsssnsersnnssen 14 3 2 3 SendCANFrame is lt sevcsiscsivesessduvcsin suse ici A A use A A decia 14 3 2 4 ReadCANFrame users 14 3 2 5 ClearError J rorrernrvrronvvrrnrrrrnvvrrsnvnrsnnvrennnrrnversnnersnnnrsnnersnnnsssnnessnnersnsnssnnrssnnnsssnnesen 14 3 2 6 CAN Message Package Format Description oooocononccnoocononcnononocononononcncnncncanonononos 14 www gemotech cn Tel 8610 5885 1690 4 Communication Driver Program under WINDOWS95 98 Description 15 4 1 Installation Description ina Kein 15 4 2 CAN Communication Driver Program Description under WINDOWS95 98 06 15 4 2 1 Install CANDriver cccccccesccsssccsessceeseeesseecesceesesecesseecsseecseeceeseeeeseeeseeesseeeseneeeges 15 4 22 UninstallGANDrIVer Jinsineisiiikiseimeieieirieineleinielnieieseleieiesetekeiadelasiasetadeddnete 16 4 2 3 SendCAN Frame srann or GS 16 4 2 4 ReadCANFrame eeccescceseeesceeseeeseeeseeeseesseesscessnesscesseecscesnecseecneseneceeeeeneeeneees 17 42 5 ClearError PON OO uu Ea eNe AAE EA A E AE EAE E ERa EEEN 17 www gemotech cn Tel 8610 5885 1690 1 General Information ISA CAN20X2 double channel no intelligent isolation CAN bus communication card is a special purpose communication card that offers the connectivity of the Controller Area Network CAN to ISA bus of your PC This card satisfies the h
4. Level Choice siennes eaea 7 4 3 3 Communication Port Setting rarrrronrronvoronvrrrnrrrrnrrerenvrrennerennrrrenrersnverenrersnnerennssennr 7 5 Installation IEEE RE EE i 8 5 1 Installation SD nro keen taa Pan anses 8 52 REMOVING Step E A E N A A A A O A S 8 The Problem Solving While Using cin 8 6 1 ISA CAN20X2 Card Can t Communicate soronnnrrnnveronvvrsnnnrrnnvrrnnrersnverennrrensnresrrrrssnersnnernn 8 6 2 ISA CAN20X2 Card Communication Fails Too Many ooooconcccoccnocononanonanonononannnannncrnncnnnc ns 8 7 Application Attention ME 9 S DIFE SO LAYE nia AAA AA AAA 9 Appendix CAN20 Card Driver Function Usage Description 9 1 General Information romina moriria diia 9 2 Communication Driver Program under Dos Description 9 2 1 InstalIGAN DEV iii Eee 10 2 2 Uninstall CANDriver ereronrnonrnonenenrnenvnenrnenrnenrnenvnenreenrnensnenrnensnenrnsnrnsnrnsnrnsnrnsnrnsnrnsnnnsnsee 11 2 3 SendCANErame J canse indicate 11 JA REC ANANAS 11 2 5 Clear Error ui ie esse 11 2 6 CAN Message Package Format DeSCTiptiOn cccscccssseeseneeeeneeeeeecescecseneeeeseeesseeenseees 12 3 Communication Driver Program under WINDOWS3 x Description 12 Sil Installation Desermuon uassusagpdndnesdndnemnend hermed nuvi 12 3 2 CAN Communication Driver Program Description under WNDOWS3 X rnerrnerrnerrnennne 12 3 2 1 Install CANDriver eenrronvrenrnrnvnrnrnenrnrnrnenrnenreenrnensnenreenrnennnensnennnensnensnsnsnensnsnsssnssen 13 3 2
5. t exist OO I Ww No Can t create event 11 Can t load VXD 14 Bottom queue create fail 4 2 2 Uninstall CANDriver Function prototype int Uninstall CANDriver void Function Release the system resource occupied by CAN driver program before the program exit Parameters no Return value 0 Uninstall driver success 5 Not load driver ever 4 2 3 SendCANFrame Function prototype int SendCANFrame BYTE FAR pFrame Function Transmit CAN communication package Parameters Note The parameters of this function have more different with that in WINDOWS3 1 pFrame is the far pointer point to the buffer that saves the transmit communication package and this buffer area s length should be 11 bytes BYTEO Port number Must be 0 16 www gemotech cn Tel 8610 5885 1690 BYTE1 10 CAN package refer to table 3 2 6 Return value 1 True Transmit success 0 False Transmit fail 4 2 4 ReadCANFrame Function prototype int ReadCANFrame BYTE FAR pFrame Function Receive CAN communication package from buffer queue Note that this port must be called at the disposal code of WM_USER 255 message It must be called repeatedly until the port return value less than or equal 0 viz read out all the message packages from buffer queue Or else user application can t receive WM U SER 255 message If user adopt multithreading and event system to wait the notice of driver program it need open Note Not create because driver progra
6. 2 CAN2 BASE of card choice switch 4 2 ISA CAN20X2 Signal Input Output Socket Definition CNI GND Bus L NY UE Ln 9 8 7 Bus H 6JGND Fig 4 2 ISA CAN20X2 card signal input output socket definition Signal Description Bus H CAN communication signal high level Bus L CAN communication signal low level GND Ground www gemotech cn Tel 8610 5885 1690 4 3 Switch and Jumper Choice 4 3 1 BASE of card choice The BASE of ISA CAN20X2 communication card chose by the setting of BASEADDR1 switch or BASEADDR2 switch The BASE of card can set as any binary code combination between 200H 3F8H ISA CAN20X2 card will occupy 8 continuous I O addresses that begin from the BASE The BASE of card choice switch sketch map as fig 4 3 1 lalala Fig 4 3 1 ISA CAN20X2 base address choice Address line A8 A7 A6 A5 A4 A3 Decimal 256 128 64 32 16 08 Hex 100 80 40 20 10 08 The BASE address range is 512 1023 0200H 03F8H It is valid when switch is at OFF and it is invalid when switch is at ON The calculation formula of BASE is BASE 512 200H sum of all valid bits For example The BASE of card in fig 4 3 1 calculates as follows BASE of card 512 128 640 Or 0200H 80H 0280H 4 3 2 Interrupt Level Choice Before you set the interrupt request jumper of ISA CAN20X2 card for avoiding interrupt occupy conflict please check the existing hardware occupy interrupt situation of your PC The interrupt requests used by I
7. 50K 0xC3A3 125K 0xC7A3 50K OxC7AF CAN StationAddress is the station address of this station CAN_Mask is the receive mask word of communication card as the decision to receive message package with CAN StationAddress together The decision formula is as follows ID CAN MASK CAN MASK CAN StationAddress Among it ID is high 8 bits of message package symbol For example When CAN MASK 0xFF then receive all the message package of network when CAN MASK 90 only receive the message package which ID equal to CAN StationAddress Receive mask word setting example Suppose there are total 3 stations in CAN bus set the station ID as 10 12 and 13 Among it the station which ID is 10 need to receive the message package which identifier is 10 and 11 the station which ID is 12 only concern the message package which identifier is 12 the station which ID is 13 want to receive all message package Because 10 and 11 only different in the most lowest bit 00001010 and 00001011 so the interrupt mask word of station 10 should be 00000001 namely 0x01 Station 12 only concerns the message package relative to it so its interrupt mask word should be 0x00 and station 13 should be set as OxFF Return value 0 Installation success 13 www gemotech cn Tel 8610 5885 1690 1 Installation fail and virtual device not load 2 Installation fail and call port parameters isn t right 3 Installation fail and virtual device in
8. SA CAN20X2 are IRQ3 IRQ4 IRQ5 IRQ7 IRQ9 IRQ10 IRQ11 IRQ12 and IRQ15 The setting way of interrupt The user can set the jumper in corresponding location according to the definition of JP1 and JP3 When JP1 is at X it means there isn t interrupt level has been chosen 4 3 3 Communication Port Setting Communication port adopt DB 9 male socket user can adopt DB 9 female plug to connect it The pins of DB 9 socket refer to section 4 2 When used ISA CAN20X2 only uses the BUS H and BUS L of CN1 port The wiring way sees fig 4 2 3 CAN is half duplex communication protocol So user can perform the data transmit and receipt only need one pair wire but this pair wire has polarity If network has many devices to connect please connect their BUS H together and connect their BUS L together Refer to fig 4 3 3 Since CAN is a all digital communication the signal exist reflection during its transmission process in www gemotech cn Tel 8610 5885 1690 communication cable so it need to add matching resistance when setting CAN Refer to fig 4 3 3 and the resistance value is 120Q This card already installs matching resistance user can choose if to use the matching resistance or not by jumper JP2 according to the factual need of work field Jumper plug in means to choose matching resistance 5 Installation Removing ISA CAN20X2 card prohibit to plug and pull when power on Plug in or pull out the wire pin the switch setting
9. V1 1 2009 03 06 ISA CAN20X2 User s Manual GEMOTECH Beijing Gemotech Intelligent Technology Co Ltd www gemotech cn Tel 8610 5885 1690 l General Information cion ctra rico iii eta 4 2 Performance and Technical Index indi in 4 2 1 Performance sorrnnnrronnnrrnnvrrnvvrrsnnnrsnnvrennnrrnnrersnnerennnrsnnersnnnsrsnnessnnerennessnnresnnnersnnsssnnessnnnssnnsee 4 22 Io AA AO 4 2 3 VEN 0 0 6 67511 Off UREN REE A A EEE EN 4 2 4 Physical Dimension and Operation Environment reenrnonrnenrnenrnenrnenrnenrnenrnevrnernnennee 5 VNR 5 3 1 Work Principle General Description rrrnrrnnrrrrnrrrrnnvrrenvrrennrrrnnrrrsnrerennerennerennerssnssrsnssrenneren 5 3 2 1 ISA bus port part s sosorsnorsnorrnersnersnerenersnersnersnersnessnessnessnessnnssnnssnessnnssnessnessneses 5 3 2 2 CAN Communication Part c cccssccssccsiscsscessscstcestecstcessecsteentecnscevtosntearsdentvesstendeartzente 5 4 Main Element Location Figure Signal Input Output Socket and Switch Chose DOI a OS 5 4 1 Main Element Location Figure rronononrrnrnenrvrnrnenrnenrnenrnenenensnensnensnensnensnenssensnenssenesenssenseene 5 42 ISA CAN20X2 Signal Input Output Socket Definition orrnrnrnrnrnenrnenrnenrnernnennne 6 4 3 Switch and Jumper Choice cecceccesecsseceecececeseceeeceeeceneceeeceeeceeeceeeceeeceneseneeeneeees 7 4 3 1 BASE of card choice enrnonrnenrnenrnenrnenrnenrnenrnensnensnensnensnensnensnensnensnensnensnensnensner 7 4 3 2 Interrupt
10. be called independently 2 5 ClearError Function prototype int ClearError void Function Set every register of CAN20 card anew to eliminate some casual error Parameters no Return value 11 www gemotech cn Tel 8610 5885 1690 1 Eliminate error success 0 Have severe error can t eliminate error gt 2 6 CAN Message Package Format Description CAN message package include 2 parts message part and data part The first 2 bytes is message part and the former 11 bits is identifier The former 8 bits uses to receive decision which should include the destination address of this message package the following bit is RTR bit should set as 0 and the last 4 bits is DLC Data Length Bit viz the actual length of transmit data unit byte The rest 8 bytes are data part which save the actual transmit data See table 2 6 for detail Table 2 6 CAN message package format description 7 6 5 4 3 2 1 4 0 Byte 1 Identifier High 8 bits Byte 2 Identifier RTR DLC Byte 3 Data Byte 4 Data Byte 5 Data Byte 6 Data Byte 7 Data Byte 8 Data Byte 9 Data Byte 10 Data 3 Communication Driver Program under WINDOWS3 x Description 3 1 Installation Description The driver under WINDOWS3 x includes 2 files CANDRV DLL and FUNCS DLL Copy them from WINDOWS directory of floppy disk to WINDOWS SYSTEM of hard disk or the directory where the user applica
11. d www gemotech cn Tel 8610 5885 1690 2 Choose appropriate wire 3 According to the protocol of CAN network check if the network structure is reasonable 7 Application Attention Item At the package of manufacture that works off by the company user will find a ISA CAN20X2 communication card a 3 5inch floppy disk Include a set of driver program and test program of ISA CAN20X2 card and this instruction book s electronic version Before uses ISA CAN20X2 communication card please pay attention to the following problem Don t touch the front IC chip of ISA CAN20X2 card by hand avoiding the chip damaged by electrostatic 8 Driver Software For the user using ISA CAN20X2 card flexibly and conveniently we make program of DOS driver program WINDOWS 16 bits driver program Fit for Win95 and WINDOWS 32 bits driver program Fit for Win98 Appendix CAN20 Card Driver Function Usage Description 1 General Information For the user using ISA CAN20X2 card flexibly and conveniently we program CAN20 card driver function for user User can use C language to call the driver function of CAN20 card In user driver program disk there are examples of how to call driver function under DOS and WINDOWS please refer them 2 Communication Driver Program under Dos Description There are 5 function of driver program under DOS InstallCANDriver e UninstallCANDriver SendCANFrame ReadCANFrame e ClearError www gemo
12. driver program includes 5 functions Install CANDriver e UninstallCANDriver SendCANFrame ReadCANFrame e ClearError The calling ways of each function is similar with that under WINDOWS3 x and add some error message to help user to analyze Please refer to the following description 4 2 1 InstallCANDriver Function prototype int InstallCANDriver HWND hWnd WORD CAN BaseAddress WORD CAN IntNo WORD CAN bps WORD CAN StationAddress WORD CAN Mask Function Initialize every registers and virtual devices of CAN20 communication card ready for the normal CAN communication Parameters HWnd is window handle After connect to message package virtual will send a message to this window The message value is WM USER 255 After receive this message user application program call Read ANFrame port to read all message package from buffer queue until the queue is empty And perform corresponding disposal If hWnd is 0 user need receive notice from multithreading and event system to read message package CAN BaseAddress is the BASE of card corresponding to the dial switch of card address CAN IntNo is the interrupt number of communication card Its calculation formula is CAN IntNo IRQ No 8 112 15 www gemotech cn Tel 8610 5885 1690 CAN bps is the baudrate of communication card It has 5 types baudrate now see to table 3 2 1 If user wants to use other baudrate please refer to the book concerned CAN bus
13. igh real time demand of CAN network and with its built in CAN controllers it can monitor and control the meter and control devices in industry field which have CAN ports CAN is a kind of all digital communication network At abroad it has already installed lots of sensors actuators and motors etc industry devices that have CAN communication ports At domestic many industry control devices that have CAN ports are admissive by most users gradually 2 Performance and Technical Index ISA CAN20X2 with DC AC in card its CAN communication doesn t need outside supply fit for universal situation 2 1 Performance 2 channels 8 bits ISA bus data width CAN network communication can speed up to 1M bit s DOS driver WIN9X driver WIN NT WIN2000 driver CAN network adopt DB 9 male connector 1000VDC isolated voltage 2 2 Technical Index ISA bus data width 8 bits ISA bus interrupt setting range IRQ3 IRQ4 IRQ5 IRQ7 IRQ9 IRQ10 IRQ11 IRQ12 IRQ15 CAN network communication rate 1M bit s CAN controller Philips SJA1000 CAN transceiver Philips 82c250 CAN connector DB 9 male Isolated voltage 1000VDC 2 3 Application e All kinds of distribution mode control system e The communication network desired strong anti jamming capacity www gemotech cn Tel 8610 5885 1690 2 4 Physical Dimension and Operation Environment Dimension 160mm 107mm Operating Temperature 0 50 C Storage Temperature 25 C 85 C Humidity 90 n
14. itialize fail 3 2 2 Uninstall CANDriver Function prototype void export WINAPI Uninstall CANDriver void Function Release the system resource occupied by CAN driver program before the program exit Parameters no Return value no 3 2 3 SendCANFrame Function prototype int export WINAPI SendCANFrame BYTE FAR pFrame Function Transmit CAN communication package Parameters pFrame is the far pointer point to the buffer that saves the transmit communication package and this buffer area s length is 10 bytes Return value 1 True Transmit success 0 False Transmit fail 3 2 4 ReadCANFrame Function prototype int_export WINAPI ReadCANFrame BYTE FAR pFrame Function Receive CAN communication package from buffer queue Note that this port must be called at the disposal code of WM_USER 255 message It must be called repeatedly until the port return value less than or equal 0 viz read out all the message packages from buffer queue Or else user application can t receive WM_U SER 255 message Parameters pFrame is the far pointer point to the buffer that saves the transmit communication package and this buffer area s length is 10 bytes Return value gt 0 There are message packages not read from the buffer queue lt 0 Buffer queue is empty and can be returned 3 2 5 ClearError Function prototype BOOL export WINAPI ClearError void Function Set every register of CAN20 card anew to elimina
15. m already create this event an event named CanReceiveEvent and wait this event at a thread When this event coming should like the message disposal code mentioned above call this function repeatedly until the return value less than 0 This event restore automatically needn t the user restore it Don t wait this event in many threads also don t call this function in many threads or else may occur unpredictable results Parameters pFrame is the far pointer point to the buffer that saves the transmit communication package and this buffer area s length should be 11 bytes Its format is as follows BYTEO Port number Must be 0 BYTE1 10 CAN package refer to table 3 2 6 Return value 0 There are message packages not read from the buffer queue lt 0 Buffer queue is empty and can be returned 4 2 5 ClearError Function prototype BOOL ClearError void Function Set every register of CAN20 card anew to eliminate some casual error Parameters no Return value 0 Success 5 Not load driver ever 7 CAN card isn t exist Note DOS WINDOWS are register trademarks of American Microsoft Company 17
16. on condensing Power consumption 5V 200mA Typical value 3 Work Principle 3 1 Work Principle General Description ISA CAN20X2 double channels no intelligent isolation CAN bus communication card can divide into two parts according their function ISA bus port part and CAN network communication part 3 2 1 ISA bus port part ISA bus port part is the bridge of the data conversion between ISA CAN20X2 card and PC s CPU The data conversion between ISA CAN20X2 card and PC s CPU performs by ISA bus circuit The data width of ISA bus is 8 bits 3 2 2 CAN Communication Part This part implement CAN physical layer and data link layer protocol The function of this port has controlled by the control circuit of the ISA CAN20X2 card 4 Main Element Location Figure Signal Input Output Socket and Switch Choice Definition 4 1 Main Element Location Figure Figure 4 1 is main element location figure of ISA CAN20X2 double channels no intelligent isolation CAN bus communication card www gemotech cn Tel 8610 5885 1690 BASEADDR1 BASEADDR2 Fig 4 1 ISA CAN20X2 card main element location figure Communication port I CN1 CAN 1 communication port JP1 CANI Interrupt level choice jumper JP2 The matching resistance of CAN1 choice jumper BASEADDRI CAN1 BASE of card choice switch Communication port 2 CN2 CAN2 communication port JP3 CAN2 Interrupt level choice jumper JP4 The matching resistance of CAN2 choice jumper BASEADDR
17. principle to calculate it by yourself Table 3 2 1Baudrate setting table Baudrate CAN bps IM OxCOA3 500K OxC1A3 250K 0xC3A3 125K 0xC7A3 50K OxC7AF CAN StationAddress is the station address of this station CAN_Mask is the receive mask word of communication card as the decision to receive message package with CAN StationAddress together The decision formula is as follows ID CAN MASK CAN MASK CAN_ StationAddress Among it ID is high 8 bits of message package symbol For example When CAN MASK 0xFF then receive all the message package of network when CAN_MASK 0 only receive the message package which ID equal to CAN_ StationAddress Receive mask word setting example Suppose there are total 3 stations in CAN bus set the station ID as 10 12 and 13 Among it the station which ID is 10 need to receive the message package which identifier is 10 and 11 the station which ID is 12 only concern the message package which identifier is 12 the station which ID is 13 want to receive all message package Because 10 and 11 only different in the most lowest bit 00001010 and 00001011 so the interrupt mask word of station 10 should be 00000001 namely 0x01 Station 12 only concerns the message package relative to it so its interrupt mask word should be 0x00 and station 13 should be set as OxFF Return value Load driver success Port already occupied by other program Interrupt initialize fail CAN card isn
18. ss Receive mask word setting example Suppose there are total 3 stations in CAN bus set the station ID as 10 12 and 13 Among it the station which ID is 10 need to receive the message package which identifier is 10 and 11 the station which ID is 12 only concern the message package which identifier is 12 the station which ID is 13 want to receive all message package Because 10 and 11 only different in the most lowest bit 00001010 and 00001011 so the interrupt mask word of station 10 should be 00000001 namely 0x01 Station 12 only concerns the message package relative to it so its interrupt mask word should be 0x00 and station 13 should be set as OxFF Callback is the pointer to the recall function that programmed by user the prototype of recall function is void _far CallbachFunctionName int Index Among it Index 1 When receive buffer area is empty and there are new message package coming interrupt service program uses this value call recall function User should call ReadCANFrame function to receive message package Please refer to the description of ReadCANFrame function 10 www gemotech cn Tel 8610 5885 1690 Index 2 When receive buffer area is full interrupt service program uses this value call recall function User can deal with it by oneself This pointer also can be empty and user read message packages from buffer area by directly call ReadCANFrame function Return value 0 Install success 1
19. te some casual error Parameters no Return value 1 True Eliminate error success 0 False Have severe error can t eliminate error 3 2 6 CAN Message Package Format Description CAN message package include 2 parts message part and data part The first 2 bytes is message part and the former 11 bits is identifier The former 8 bits uses to receive decision which should include the destination address of this message package the following bit is RTR bit should set as 0 and the last 4 bits is DLC Data Length Bit viz the actual length of transmit data unit byte The rest 8 bytes are data part which save the actual transmit data See table 3 2 6 for detail Table 3 2 6 CAN message package format description 7 61 5 4 3 2 1 4 0 Byte 1 Identifier High 8 bits Byte 2 Identifier RTR DLC Byte 3 Data Byte 4 Data Byte 5 Data 14 www gemotech cn Tel 8610 5885 1690 Byte 6 Data Byte 7 Data Byte 8 Data Byte 9 Data Byte 10 Data 4 Communication Driver Program under WINDOWS95 98 Description 4 1 Installation Description The driver under WINDOWS95 98 includes 2 files CANDRV DLL and HK CAN VXD Copy them from WIN95 directory of floppy disk to WINDOWS SYSTEM of hard disk or the directory where the user application program lie in 4 2 CAN Communication Driver Program Description under WINDOWS95 98 Under WINDOWS95 98 CAN communication
20. tech cn Tel 8610 5885 1690 2 1 Install CANDriver Function prototype int Install CANDriver unsigned int CAN BaseAddress unsigned char CAN IntNo unsigned int CAN bps unsigned char CAN StationAddress unsigned char CAN Mask void _far Callback int Index Function Initialize all registers of CAN20 communication card set interrupt vector and recall function read for normal communication Parameter CAN BaseAddress is the BASE of card corresponding to the dial switch of card address CAN IntNo is the interrupt number of communication card Its calculation formula is CAN IntNo IRQ No 8 112 CAN bps is the baudrate of communication card It has 5 types baudrate now see to table 2 1 If user wants to use other baudrate please refer to the book concerned CAN bus principle to calculate it by yourself Table 2 1 Baudrate Setting Table Baudrate CAN bps IM OxCOA3 500K OxC1A3 250K 0xC3A3 125K OxC7A3 50K OxC7AF CAN_StationAddress is the station address of this station CAN_Mask is the receive mask word of communication card as the decision to receive message package with CAN StationAddress together The decision formula is as follows ID CAN MASK CAN MASK CAN StationAddress Among it ID is high 8 bits of message package symbol For example When CAN MASK 0xFF then receive all the message package of network when CAN_MASK 0 only receive the message package which ID equal to CAN_ StationAddre
21. tion program lie in 3 2 CAN Communication Driver Program Description under WINDOWS3 x Under WINDOWS3 x CAN communication driver program includes 5 functions InstallCANDriver e UninstallCANDriver 12 www gemotech cn Tel 8610 5885 1690 SendCANFrame ReadCANFrame e ClearError 3 2 1 InstallCANDriver Function prototype int export WINAPI Install CANDriver HWND hWnd WORD CAN BaseAddress WORD CAN IntNo WORD CAN bps WORD CAN StationAddress WORD CAN Mask Function Initialize every registers and virtual devices of CAN20 communication card ready for the normal CAN communication Parameters HWnd is window handle After connect to message package virtual will send a message to this window The message value is WM USER 255 After receive this message user application program call Read ANFrame port to read all message package from buffer queue until the queue is empty And perform corresponding disposal CAN BaseAddress is the BASE of card corresponding to the dial switch of card address CAN IntNo is the interrupt number of communication card Its calculation formula is CAN IntNo IRQ No 8 112 CAN bps is the baudrate of communication card It has 5 types baudrate now see to table 3 2 1 If user wants to use other baudrate please refer to the book concerned CAN bus principle to calculate it by yourself Table 3 2 1Baudrate setting table Baudrate CAN bps IM OxCOA3 500K OxC1A3 2
Download Pdf Manuals
Related Search